body {
    background-color: #F4F7F6;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    color: #333;
}

.clock-container {
    background-color: #FFFFFF;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 100%;
    max-width: 400px;
}

h1 {
    font-size: 24px;
    margin-bottom: 10px;
}

#current-time {
    font-size: 48px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 2px;
}

#status-message {
    font-size: 16px;
    color: #555;
    margin-bottom: 30px;
    min-height: 24px;
}

.btn {
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    font-weight: 500;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-primary {
    background-color: #4A90E2;
    color: white;
}

.btn-primary:hover {
    background-color: #357ABD;
}

.btn-danger {
    background-color: #D0021B;
    color: white;
}

.btn-danger:hover {
    background-color: #A80115;
}

.btn:disabled {
    background-color: #D8D8D8;
    cursor: not-allowed;
}

.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #333;
    color: white;
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    transform: translateY(-20px);
    z-index: 1000;
}

.toast.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.toast.success {
    background-color: #50E3C2;
    color: #333;
}

.toast.error {
    background-color: #D0021B;
}